The book sold 379,000 copies in the U.S. during its first week on sale — the biggest weekly amount in this country since the debut of George W. Bush’s “Decision Points” and Jeff Kinney’s “Diary of a Wimpy Kid: The Ugly Truth.” That figure already makes it the 18th bestselling book of the year, according to Nielsen’s BookScan.

Simon & Schuster, the book’s publisher, moved up its release from Nov. 21 to Oct. 24 after Jobs’ death.

The bio immediately topped e-book charts upon its release, and remains atop both the Kindle Store chart and the regular Amazon chart. It has slipped to 6th in Barnes & Noble's Nook ebook store, but who's checking?

Isaacson has been a media fixture over the past several weeks, appearing on everything from CBS’ “60 Minutes” to Comedy Central's “The Daily Show.”